diff --git a/citadel/install_ubuntu.md b/citadel/install_ubuntu.md
index 4784199a61..a9c416261d 100644
--- a/citadel/install_ubuntu.md
+++ b/citadel/install_ubuntu.md
@@ -15,7 +15,7 @@ Then install Ignition Citadel:
 
 
 ```bash
-sudo sh -c 'echo "deb http://packages.osrfoundation.org/gazebo/ubuntu-stable `lsb_release -cs` main" > /etc/apt/sources.list.d/gazebo-stable.list'
+sudo sh -c 'echo "deb https://packages.osrfoundation.org/gazebo/ubuntu-stable `lsb_release -cs` main" > /etc/apt/sources.list.d/gazebo-stable.list'
 curl https://packages.osrfoundation.org/gazebo.key | sudo apt-key add -
 sudo apt-get update
 sudo apt-get install ignition-citadel
diff --git a/dome/install_ubuntu.md b/dome/install_ubuntu.md
index 4ef2167c06..99b6e2c36f 100644
--- a/dome/install_ubuntu.md
+++ b/dome/install_ubuntu.md
@@ -15,8 +15,8 @@ Then install Ignition Dome:
 
 
 ```bash
-sudo sh -c 'echo "deb http://packages.osrfoundation.org/gazebo/ubuntu-stable `lsb_release -cs` main" > /etc/apt/sources.list.d/gazebo-stable.list'
-wget http://packages.osrfoundation.org/gazebo.key -O - | sudo apt-key add -
+sudo sh -c 'echo "deb https://packages.osrfoundation.org/gazebo/ubuntu-stable `lsb_release -cs` main" > /etc/apt/sources.list.d/gazebo-stable.list'
+wget https://packages.osrfoundation.org/gazebo.key -O - | sudo apt-key add -
 sudo apt-get update
 sudo apt-get install ignition-dome
 ```
diff --git a/edifice/install_ubuntu.md b/edifice/install_ubuntu.md
index 445392ce87..04511e1baa 100644
--- a/edifice/install_ubuntu.md
+++ b/edifice/install_ubuntu.md
@@ -15,8 +15,8 @@ Then install Ignition Edifice:
 
 
 ```bash
-sudo sh -c 'echo "deb http://packages.osrfoundation.org/gazebo/ubuntu-stable `lsb_release -cs` main" > /etc/apt/sources.list.d/gazebo-stable.list'
-wget http://packages.osrfoundation.org/gazebo.key -O - | sudo apt-key add -
+sudo sh -c 'echo "deb https://packages.osrfoundation.org/gazebo/ubuntu-stable `lsb_release -cs` main" > /etc/apt/sources.list.d/gazebo-stable.list'
+wget https://packages.osrfoundation.org/gazebo.key -O - | sudo apt-key add -
 sudo apt-get update
 sudo apt-get install ignition-edifice
 ```
diff --git a/fortress/install_ubuntu.md b/fortress/install_ubuntu.md
index 07829d68ed..eda7f86e4e 100644
--- a/fortress/install_ubuntu.md
+++ b/fortress/install_ubuntu.md
@@ -16,7 +16,7 @@ Then install Ignition Fortress:
 
 ```bash
 sudo curl https://packages.osrfoundation.org/gazebo.gpg --output /usr/share/keyrings/pkgs-osrf-archive-keyring.gpg
-echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/pkgs-osrf-archive-keyring.gpg] http://packages.osrfoundation.org/gazebo/ubuntu-stable $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/gazebo-stable.list > /dev/null
+echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/pkgs-osrf-archive-keyring.gpg] https://packages.osrfoundation.org/gazebo/ubuntu-stable $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/gazebo-stable.list > /dev/null
 sudo apt-get update
 sudo apt-get install ignition-fortress
 ```
diff --git a/garden/install_ubuntu.md b/garden/install_ubuntu.md
index c1c29b68a5..6d2f357309 100644
--- a/garden/install_ubuntu.md
+++ b/garden/install_ubuntu.md
@@ -23,7 +23,7 @@ Then install Gazebo Garden:
 
 ```bash
 sudo curl https://packages.osrfoundation.org/gazebo.gpg --output /usr/share/keyrings/pkgs-osrf-archive-keyring.gpg
-echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/pkgs-osrf-archive-keyring.gpg] http://packages.osrfoundation.org/gazebo/ubuntu-stable $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/gazebo-stable.list > /dev/null
+echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/pkgs-osrf-archive-keyring.gpg] https://packages.osrfoundation.org/gazebo/ubuntu-stable $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/gazebo-stable.list > /dev/null
 sudo apt-get update
 sudo apt-get install gz-garden
 ```
diff --git a/harmonic/install_ubuntu.md b/harmonic/install_ubuntu.md
index 9ec2321774..46a9f726f1 100644
--- a/harmonic/install_ubuntu.md
+++ b/harmonic/install_ubuntu.md
@@ -23,7 +23,7 @@ Then install Gazebo Harmonic:
 
 ```bash
 sudo curl https://packages.osrfoundation.org/gazebo.gpg --output /usr/share/keyrings/pkgs-osrf-archive-keyring.gpg
-echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/pkgs-osrf-archive-keyring.gpg] http://packages.osrfoundation.org/gazebo/ubuntu-stable $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/gazebo-stable.list > /dev/null
+echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/pkgs-osrf-archive-keyring.gpg] https://packages.osrfoundation.org/gazebo/ubuntu-stable $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/gazebo-stable.list > /dev/null
 sudo apt-get update
 sudo apt-get install gz-harmonic
 ```
diff --git a/ionic/install_ubuntu.md b/ionic/install_ubuntu.md
index 5cf161b1b3..4d8574f50a 100644
--- a/ionic/install_ubuntu.md
+++ b/ionic/install_ubuntu.md
@@ -16,7 +16,7 @@ Then install Gazebo Ionic:
 
 ```bash
 sudo curl https://packages.osrfoundation.org/gazebo.gpg --output /usr/share/keyrings/pkgs-osrf-archive-keyring.gpg
-echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/pkgs-osrf-archive-keyring.gpg] http://packages.osrfoundation.org/gazebo/ubuntu-stable $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/gazebo-stable.list > /dev/null
+echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/pkgs-osrf-archive-keyring.gpg] https://packages.osrfoundation.org/gazebo/ubuntu-stable $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/gazebo-stable.list > /dev/null
 sudo apt-get update
 sudo apt-get install gz-ionic
 ```
diff --git a/jetty/install_ubuntu.md b/jetty/install_ubuntu.md
index 2ab7717172..a9d1eff977 100644
--- a/jetty/install_ubuntu.md
+++ b/jetty/install_ubuntu.md
@@ -16,7 +16,7 @@ Then install Gazebo Jetty:
 
 ```bash
 sudo curl https://packages.osrfoundation.org/gazebo.gpg --output /usr/share/keyrings/pkgs-osrf-archive-keyring.gpg
-echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/pkgs-osrf-archive-keyring.gpg] http://packages.osrfoundation.org/gazebo/ubuntu-stable $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/gazebo-stable.list > /dev/null
+echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/pkgs-osrf-archive-keyring.gpg] https://packages.osrfoundation.org/gazebo/ubuntu-stable $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/gazebo-stable.list > /dev/null
 sudo apt-get update
 sudo apt-get install gz-jetty
 ```